The owner of an ice cream parlour who murdered two men and hid their frozen bodies under her shop has been sentenced to life in a secure mental institution.

Estibaliz Carranza, dubbed the "ice lady" by media in her native Austria, shot dead her husband, Holger Holz, in 2008 as he sat at his computer.

Her new partner, Manfred Hinterberger, suffered the same fate two years later as he slept in bed.

The 34-year-old admitted shooting both men at close range in the back of the head before cutting up their bodies with a chainsaw, placing the body parts in a deep freeze and hiding them in concrete in the cellar of her store in Vienna.

Their remains were found by chance during maintenance work in 2011.

Judge Susanne Lehr told a court in Vienna that Carranza's confession and her state of "considerable psychological damage" were mitigating factors, but her careful planning and her behaviour after the murders counted against her.

Earlier, Carranza wept as she told the judge: "All I can say is that I'm sorry I took the lives of Holger and Manfred."

Carranza, a Mexican-Spanish immigrant, said Mr Holz had completely changed after their wedding, turning verbally abusive, lazy and joining a Hare Krishna sect.

She complained that he had refused to move out when she had a new lover, even after their divorce.

In 2010, she fired four shots at Mr Hinterberger after she had tried to start a discussion about his infidelity.

Carranza's lawyer Rudolf Mayer - who also defended Josef Fritzl, the Austrian who locked up his daughter for 24 years and fathered seven children with her - said he would appeal to have the verdict overturned.